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Recognised as Colour

#25565B

  • #25565B
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#25565B is a cyan with RGB values 37, 86, 91 and HSL 186°, 42%, 25%. It is a dark colour, so white text on it reaches 8.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#25565B#25565B
HEX#25565B
RGBrgb(37, 86, 91)
RGB (0–1)0.1451, 0.3373, 0.3569
RGB percentages14.5%, 33.7%, 35.7%
HSLhsl(185.6, 42.2%, 25.1%)
HSV / HSBhsv(185.6, 59.3%, 35.7%)
CMYK59.3%, 5.5%, 0%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,446,939
CSS custom property--colour: #25565B;

Brightness & contrast

Relative luminance0.07804WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.2:1
Contrast with white8.2:1WCAG normal text: AAA
Contrast with black2.56:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#DAA9A4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#50535Bno red cones; affects about 1% of men; ΔE 15.8 from the original
Deuteranopia#474C5Bno green cones; the most common form, about 1% of men; ΔE 16.6 from the original
Tritanopia#005957no blue cones; rare, and affects men and women equally; ΔE 8.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.2:1WCAG large text: AAA
Contrast with black, large text2.56:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 5.7Dim grey · ΔE 20Teal · ΔE 20.3Slate grey · ΔE 23.2Dark cyan · ΔE 24.5Light slate grey · ΔE 25.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 5.71, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5B2A25
Analogous#255B45, #253B5B
Triadic#5B2556, #565B25
Split complementary#5B253B, #5B4525
Tetradic#45255B, #5B2A25, #3B5B25

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#80C5CC
Lighter +30%#5CB4BD
Lighter +20%#429BA4
Lighter +10%#34787F
Darker −10%#163437
Darker −20%#081112
Darker −30%#000000
Darker −40%#000000
More saturated +25%#15636B
Less saturated −25%#35494B

Channel breakdown

R37
G86
B91
Red37 (14.5%)
Green86 (33.7%)
Blue91 (35.7%)
Hue185.56°
Saturation (HSL)42.19%
Lightness25.1%
Dominant channelBlue
Hex per channelR 25 · G 56 · B 5B

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Every value on this page was computed from “25565b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.